The integration of unified communication involves software, hardware, mobile devices, and fixed devices. The standards and protocols are different. Therefore, the integration is difficult.
In terms of IP phones and desktop applications, there are mainly SIP and H.323 Protocols; mobile videos are H.324M; Monitoring also includes H.323, SIP and proprietary protocols as well as MEPG2, MEPG4, and H. 264 and other video formats; video conferences are dominated by H.323; 2G phones and general telephones include G.711 and G.722 audio formats. There are many communication, control, voice and video protocols, and communication signaling. To integrate and unify products and applications between these protocols, suppliers must have strong underlying technical support capabilities.
After the integration of these systems, the Unified Communication itself also needs to form a standardized system to facilitate the deployment of enterprises. Otherwise, it is difficult for enterprise users to protect their investment without standardized support, may have doubts about deploying unified communications. However, at present, the standardization process is not satisfactory, and the standardization is still in its initial stage. The standardization of Unified Communication is not only related to technology, but also related to the concepts held by various vendors for Unified Communication.
On the one hand, in the Unified Communication System, protocols have not yet been compatible, and various protocol standards are still under development. On the other hand, systems of different manufacturers are difficult to be compatible with each other in terms of technical standard selection and Protocol compatibility, which will cause problems for future business compatibility and interoperability. In terms of terminal protocols, the diversity of terminal protocols will bring about many problems such as terminal version upgrade and maintenance. In addition, many private protocols are widely used by mainstream communication vendors in Unified Communication, resulting in interconnection between devices of different manufacturers and increased operation costs and complexity, it is not conducive to the healthy development of the Unified Communication Market. According to experts, it takes at least five or even ten years for Unified Communication Standards to mature from the current chaotic status.
Because the development of the SIP protocol is simple and flexible, it is easy to add new services and has high scalability, so it is supported by more and more enterprises. The SIP protocol may become a factual standard in Unified Communication, however, the SIP protocol is still developing, and the process is still relatively long.
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